scholarly journals Inter and intra-observer errors for postoperative total hip radiographic assessment using computer aided design

2021 ◽  
Vol 87 (1) ◽  
pp. 65-71
Author(s):  
Adnan Faraj ◽  
Mark Andrews ◽  
Weiguang Li
Keyword(s):  
Computer Aided Design ◽  
X Rays ◽  
Radiographic Assessment ◽  
Rater Reliability ◽  
Total Hip ◽  
Computer Aided ◽  
Medical Note ◽  
Aided Design ◽  
High Degree

Plain radiographic assessment of primary total hip arthroplasty following surgery remains to be the commonest radiological assessment. The current paper, studies the accuracy and concordance between observers reviewing these radiographs. A prospective radiographic and medical note review of ten patients who underwent total hip replacement for primary osteoarthritis, with a mean age of 69 years. Early and 6 weeks postoperative x-rays were assessed for hip profile and version profile using computer aided design (CAD) by two observers on two different occasions. The observers were Orthopaedic surgeons who perform arthroplasty of the hip. The results were analyzed statistically. Dimensions, including Femoral offset, medial offset and ilioischial offset showed a high degree of inter- film and intra-film correlation, with inter-class correlation (ICC) over 0.8. Except of the intra-film correlation of ilioischial offset measured on the post- operative films (p=0.067) by the first rater, all the intra and inter film correlation were significantly over the benchmark of 0.6. In terms of stem alignment, cup inclination and cup version, the intra-film correlation by rater n°2 ranges from 0.574 to 0.975 and were significantly over the benchmark of 0.6, except in the case of cup inclination measured on the 6 th? week follow-up ; meanwhile the intra-film correlation by rater n°1 ranges from 0.581 to 0.819 and none were significantly over the benchmark of 0.6. The inter-rater reliability and inter-film correlation showed a dichotomy of results among different dimensions of the measurement. Dimensions of femo- ral offset, medial offset and ilioischial offset showed a substantial degree of reliability in terms of inter-rater reliability, inter-film correlation, and intra-rater/film reliability.

scholarly journals Monitoring Alveolar Ridge Remodelling Post-Extraction Using Sequential Intraoral Scanning over a Period of Four Months

2020 ◽  
Vol 17 (18) ◽  
pp. 6638
Author(s):  
Khaled E. Ahmed
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Dimensional Changes ◽  
Intraoral Scanning ◽  
Computer Aided ◽  
Potential Applications ◽  
Cad Cam ◽  
Aided Design ◽  
2D And 3D

The potential applications of computer-aided design/computer-aided manufacturing (CAD/CAM) and intraoral scanning exceed the delivery of standard prosthodontic interventions. The aim of this study was to clinically present a developed assessment technique, that relies on the use of sequential intraoral scanning, three-dimensional superimposition, and 2D and 3D deviation analyses based on a standardised protocol, as an auxiliary tool in monitoring dimensional changes of residual ridge post-extraction with a follow-up period of four months.

scholarly journals Digital restoration of maxillary central incisors after trauma using an intraoral scanner and a CAD/CAM system in an 11-year-old

2021 ◽  
Vol 6 (11) ◽  
Keyword(s):  
Computer Aided Design ◽  
Dental Trauma ◽  
Tooth Color ◽  
Computer Aided ◽  
Digital Restoration ◽  
Cad Cam ◽  
Ceramic Crowns ◽  
One Year ◽  
Aided Design

Background: Most dental trauma in children and adolescents involve anterior tooth fractures. Advancements in ceramics technology and in computer-aided design/computer-aided manufacturing (CAD/CAM) systems, have led to the technological abilities to produce single all-ceramic crowns with high biocompatibility, esthetics, and optimal mechanical properties. However, there is no information regarding the use of this technique in children. Case report:Treatment of extensive crown fractures on an 11 years old patient using a chairside CAD/CAM technology. The teeth were scanned and the restorations were fabricated using the manufacturing unit of the CAD/CAM system and glazed to the appropriate tooth color. At a follow up visits the restorations kept their strength and esthetic appearance (one year follow up). Conclusion: The digital restoration treatment is especially suitable for treating children with dental trauma. It has the advantage of better esthetic, functional and durable results compering to conventional restorations, and it often requires only a single session.

scholarly journals Implant-Supported PMMA Monolithic Full-Arch Rehabilitation with Surgical Computer-Planned Guide and Immediate Provisional: A Case Report with One Year Follow-Up

2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
Vincenzo Luca Zizzari ◽  
Gianmarco Tacconelli
Keyword(s):  
Case Report ◽  
Dental Implants ◽  
Computer Aided Design ◽  
Computer Aided ◽  
One Year ◽  
Aided Design

The aim of this case report is to describe the surgical and prosthetic procedures to achieve maxillary and mandibular implant-supported PMMA monolithic full-arch rehabilitation (PMFR) with surgical computer-planned guide and immediate provisional. In such cases, the correct planning of dental implants’ position, length, and diameter and the prosthetic phases via computer-aided design are very important to achieve good aesthetic and functional long-lasting results.

scholarly journals Use of Digital-Conventional Method for Managing a Patient with Severely Worn Dentition: A Clinical Report

2018 ◽  
Vol 2018 ◽  
pp. 1-6
Author(s):  
Saied Nokar ◽  
Amirreza Hendi ◽  
Yasamin Babaee Hemmati ◽  
Mehran Falahchai
Keyword(s):  
Conventional Method ◽  
Computer Aided Design ◽  
Clinical Report ◽  
Removable Partial Denture ◽  
Computer Aided ◽  
Complex Procedure ◽  
Cad Cam ◽  
Full Mouth Rehabilitation ◽  
Aided Design

Severe forms of attrition are frequently found in patients with no or insufficient posterior occlusal support. Management of such patients using fixed or removable prostheses is a complex procedure and is still a challenge for clinicians. The present clinical report describes step by step full mouth rehabilitation of a patient with severely worn dentition using computer-aided design/computer-aided manufacturing- (CAD/CAM-) generated wax patterns, milled zirconia frameworks, and fabrication of removable partial denture (RPD) abutments using a digital-conventional method. The results were satisfactory during 18 months of follow-up.

scholarly journals Total talar prosthesis with and without ankle ligament reconstruction using the three-dimensional computer-aided design and computer numerical control manufacturing techniques

2020 ◽  
Vol 12 (3) ◽  
Author(s):  
Chayanin Angthong ◽  
Prasit Rajbhandari
Keyword(s):  
Computer Aided Design ◽  
Ligament Reconstruction ◽  
Three Dimensional ◽  
Computer Numerical Control ◽  
Numerical Control ◽  
Ankle Ligament ◽  
Computer Aided ◽  
The Mean ◽  
Aided Design

Severe damage and bone loss of the talus are problematic issues because of its unique shape, function, and characteristics. This present study’s objective is to propose the process of customized total talar prosthesis manufacturing, using three-dimensional (3D) Computer-Aided Design (CAD) with Computer Numerical Control (CNC) production along with evaluation of the results of total talar prosthesis replacement with or without ankle ligament reconstruction in patients with severe conditions of talus. The case series included five patients (mean age: 27.6 years) with severe talar loss or damage. The mean follow-up time was 17.8±8.4 months. Related complications were: i) mild subsidence in 1 patient (20%) and ii) periprosthetic fracture in another patient (20%). The mean clinical scores including VAS-FA and SF-36 were improved following surgeries. Customized total talar prosthesis appears to provide satisfactory outcomes for the treatment of severe talar loss or damage at a short-term follow-up.

Synthesis of Kinematic Chains via Method of Cut-Set Matrix With Modulo-2 Operation

1973 ◽  
Vol 95 (3) ◽  
pp. 681-684 ◽  
Author(s):  
M. Huang ◽  
A. H. Soni
Keyword(s):  
Computer Aided Design ◽  
Tree Graph ◽  
Kinematic Chains ◽  
Tree Graphs ◽  
Computer Aided ◽  
Cut Set ◽  
Aided Design ◽  
High Degree

Method of cut-set matrix with modulo-2 operation is used to enumerate all possible tree graphs from a given tree graph. The typical kinematic chains corresponding to the tree graphs are the chains with cams and gears. The equations used to find the number of heavy edges (corresponding to cam or gear joints) and fine edges (corresponding to turning joints) required in the tree graphs are presented. A table of tree graphs and their corresponding cam kinematic chains is prepared. The method is potentially promising for computer-aided design application because of its simplicity, compact notation, and high degree of organization.

Sign in / Sign up

Export Citation Format

Share Document